/**
 * visitable.h is part of Gedule.
 *
 * Gedule is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * Gedule is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with Gedule.  If not, see <http://www.gnu.org/licenses/>.
 */

#ifndef VISITABLE_H
#define VISITABLE_H

// Forward declarations
class Visitor;

class Visitable
{

public:

    virtual ~Visitable() {}

    virtual void Accept( Visitor * a_visitor, bool a_depthFirst = true ) = 0;

protected:

    Visitable() {}

private:

    // Protect default copy constructor.
    Visitable( const Visitable & a_other );

    // Protect default operator =.
    Visitable & operator = ( const Visitable & a_other );

};

#endif // VISITABLE_H
